504  Bibliography, Etc. Note (R)

Record Type


Input Standards

Field (Full/Minimal)
Required if applicable/Optional
1st Indicator  Undefined
blank character Undefined
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Bibliography, etc. note (NR) Mandatory/Mandatory
ǂb Number of references (NR) Optional/Optional
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional


A note about a bibliography, discography, filmography, webliography, and/or other bibliographic references in an item. Use field 504 also to indicate the presence of a bibliography, etc., in accompanying material that is described in the record. For multipart items, including serials, the note may pertain to all parts or to a single issue or part.

Use field 500 for regulations, statutes, and tables of cases. Enter notes in field 500 if a note mentions contents in addition to the bibliography and the bibliography is not deemed sufficiently extensive to warrant a separate note. Use field 504, however, when the presence of an index is mentioned in a bibliography note. In cases of doubt, use field 504 rather than field 500.

Refer to LCRI 2.7B18 or LC-PCC PS for further information regarding the use of 504 notes. For current cataloging do not input square brackets around unnumbered pages or leaves per LC-PCC PS 1.7.1.

For information on punctuation, see the Punctuation section below.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank.

blank character


2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character Undefined


ǂa Bibliography, etc. note

The entire text of the note.

504     Includes bibliographical references
504     Includes bibliographical references (pages 310-325) and index
[Item includes bibliography, webliography, and index]
504     Includes bibliographical references (leaves 238-239)
504     Includes bibliographical references (leaf 315) and index
504     Chronological list of the author's works: pages 469-475
504     Discography: pages 105-111
504     Filmography: volume 2, pages 344-360
ǂb Number of references

The number of references contained in the bibliography. Generally, it is used as a way to determine the significance of a bibliography. Enter a simple numerical count of references following the bibliography note.

504     Includes bibliographical references ǂb 19
504     Includes bibliographical references (pages 67-68) ǂb 51
ǂ6 Linkage

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ8 Field link and sequence number

For information about subfield ǂ8, see Control Subfields.


For records containing punctuation, follow these instructions:

  • Include incidental punctuation needed within any subfields, e.g., commas, periods (following abbreviations or initials), etc.
  • Optionally, add a terminal period at the end of the field (preceding subfield ǂb) unless the last subfield ends with an ellipsis or period (following an abbreviation or initial)
504     Includes bibliographical references (page 38). ǂb 21

For records containing minimal or no punctuation, include incidental punctuation needed within any subfields. Otherwise, omit the punctuation outlined above.

504     Includes bibliographical references (page 38) ǂb 21

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.


For indexing and searching information, see Searching WorldCat Indexes, field 504.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 504.